2" Vertical Mount Fire Damper 2501-12X10 Residential Registers & Grilles back blades parallel to longest

back blades parallel to longest dimension

listed Fire-Resistance Diffusers * TVB - Thermal Vapor Blanket * Square collar

11/32” Wide x 1-27/32” High slots

To adjust diffuser

2" Vertical Mount Fire Damper 2501-12X10 Residential Registers & Grilles back blades parallel to longesth3. Standard Features * 2501 Square or rectangular for vertical mount only. Maximum dimension 48w, 49h. * 2502 Square or rectangular spring actuated (6) for horizontal or vertical mount. Maximum dimension 41w, 36h. * UL and California State Fire Marshall approved * 2" thinline frame * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G 90) * Self